考虑模型误差的动载荷反演问题研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (24) : 16-19.

论文

考虑模型误差的动载荷反演问题研究

毛玉明陈健刘靖华狄文斌

作者信息 +

Study on dynamic force estimation problem with structural model errors

Mao Yuming Chen Jian Liu Jinghua Di Wenbin

Author information +

文章历史 +

摘要

动载荷反演分析技术应用于实际工程，除了受到测量响应中存在的测量误差影响外，还受到数值仿真模型与实际工程模型之间差异的影响，针对这一问题建立了考虑模型误差的动载荷反演时域分析模型，并提出了基于总体最小二乘的正则化求解方法。数值仿真表明，本文提出的方法可以降低模型误差和响应噪声带来的影响。

Abstract

When dynamic force estimation techniques are applied to real engineering, the estimation results are affected in addition by the white noise in measured responses, but also the difference between the numerical model and the real engineering model. This paper founds a dynamic force estimation model addressed the errors associated with the measured responses and structural model in time domain, and a regularization technique based on total least squares method is used to solve this dynamic force estimation model. Numerical test results demonstrate that under certain conditions, this method can reduce the impact of these errors.

导出引用

毛玉明陈健刘靖华狄文斌. 考虑模型误差的动载荷反演问题研究[J]. 振动与冲击, 2012, 31(24): 16-19

Mao Yuming Chen Jian Liu Jinghua Di Wenbin. Study on dynamic force estimation problem with structural model errors[J]. Journal of Vibration and Shock, 2012, 31(24): 16-19